Assessment of atrazine toxicity to the estuarine phytoplankter, Dunaliella tertiolecta (Chlorophyta), under varying nutrient conditions
| Autor: | JoAnn M. Burkholder, Stacie L. Flood, Greg Cope |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Health Toxicology and Mutagenesis Population Dunaliella Chlorophyta 010501 environmental sciences 01 natural sciences Algal bloom chemistry.chemical_compound Nutrient Chlorophyceae Phytoplankton Environmental Chemistry Atrazine education 0105 earth and related environmental sciences education.field_of_study biology Herbicides 010604 marine biology & hydrobiology fungi General Medicine biology.organism_classification Pollution chemistry Environmental chemistry Environmental science Ecotoxicity Water Pollutants Chemical |
| Zdroj: | Environmental science and pollution research international. 25(12) |
| ISSN: | 1614-7499 |
| Popis: | Anthropogenic inputs of chemical environmental contaminants are frequently associated with developing harmful algal blooms, but little is known about how estuarine phytoplankton assemblages respond to multiple, co-occurring chemical stressors in chronically disturbed habitats. The goals of this research were to establish a robust protocol for testing the effects of atrazine on estuarine phytoplankton, and then to use that protocol to compare the effects of atrazine exposure with and without nutrient enrichment on a cosmopolitan estuarine/marine alga, Dunaliella tertiolecta (Chlorophyta). Atrazine sensitivity in nutrient-replete media (96-h growth inhibition $$ \overline{x} $$ ) was 159.16 μg l−1, but sensitivity was influenced by exposure duration, and inhibitory effects of herbicide on algal growth decreased under imbalanced nutrient regimes and low nitrogen and phosphorus supplies. These findings advance knowledge about how nutrient regimes and herbicides interact to control estuarine phytoplankton population dynamics. |
| Databáze: | OpenAIRE |
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